﻿/*
 * Twipler - Twitter Web Client with features.
 *  
 *  Copyright (C) 2009, 2010. Ian Quigley
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details. 
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 */

using System.Collections.Generic;
using Twipler.App.Parse.Html.Consumers;
using Twipler.App.DataDoc;

namespace Twipler.App.Render.Tree
{
    public class DocSelectItem : AbstractItem
    {
        private AbstractItem _renderItem;
        private string _name;
        private string _select;
        private string _into;

        public override List<AbstractItem> Children { get { return new List<AbstractItem> { _renderItem }; } }

        public static DocSelectItem Create(AbstractItem containedItem, DocSelectConsumer.DocSelectParams arguments)
        {
            return new DocSelectItem
            {
                _renderItem = containedItem,
                _name = arguments.Name,
                _into = arguments.Into,
                _select = arguments.Select
            };
        }

        public override void Render(System.Text.StringBuilder html, App.Machine.Environment environment)
        {
            IDataDoc doc = environment.Variables_Get(_name) as IDataDoc;
            if (doc == null)
                return;

            List<IDataDoc> select = doc.Select(_select);
            if (select == null)
                return;

            object descope = environment.Variables_Descope(_into);


            foreach (IDataDoc item in select)
            {
                environment.Variables_Add(_into, item);
                _renderItem.Render(html, environment);
            }

            environment.Variables_Restore(_into, descope);
        }
    }
}